What track is this you trapped over 115 at or is it desktop dyno or something? I mean since you are scared of breaking your tranny and stuff.Originally Posted by run4cover
Also a 347 can make 400 rwhp all day long using a tight lash solid roller cam,good ported heads,Vic 5.0 intake/TFS R/Holley,good compression,long tubes. I have seen 460 rwhp actually out of a little street 347 turning 7500 rpm.
Ls1s are only 346 cubic inches and its not very hard to get them to 400 rwhp. You just apply the same principles to building a 347 with regards to intake runner lenthts,compression ratio,cylinder head flow/port sizes.





Like I said, find me someone with your "magical" engine combo and tell them to bring it.
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